JOURNAL OF HAZARDOUS MATERIALS
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2018
·
IF 6.434
Jiafeng Ding,Gaoyuan Long,Yang Luo,Runze Sun,Mengxia Chen,Yajun Li,Yanfang Zhou,Xinhua Xu,Weirong Zhao
Polychlorinated dibenzo- p -dioxins (PCDDs), as a group of notorious anthropogenic environmental toxicants, are arguably ubiquitous in nature. In this study, we investigated the photocatalytic reductive dechlorination of 2-chlorodibenzo- p -dioxin (2-CDD) over Pd/g-C 3 N 4 catalysts under UV–vis irradiation. The g-C 3 N 4 and a series of Pd/g-C 3 N 4 catalysts were prepared by thermal polymerization and mechanical mixing-illumination method and characterized by XRD, TEM, BET, SEM and UV–vis DRS analyses. Among all the samples, the Pd/g-C 3 N 4 (5 wt%) yielded the optimal dechlorination activity with a total 2-CDD conversion of 54% within 4 h, and 76% of those converted 2-CDD were evolved to dibenzo- p -dioxin (DD). The kinetics of dechlorination could be described as pseudo-first-order decay model (R 2 > 0.84). Corresponding rate constants (k) increased from 0.052 to 0.17 h −1 with Pd contents up to 5 wt% and decreased to 0.13 h −1 with a 10 wt% of Pd. The enhanced activities originated from the surface plasmonic resonance (SPR) effect of Pd nanoparticles and the formation of Schottky barrier between Pd and g-C 3 N 4 , which extend the spectrum responsive range and suppress the charge recombination of g-C 3 N 4 . This is the first report on the photocatalytic reductive removal of PCDDs and may provide a new approach for PCDDs pollution control.
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MATERIALS RESEARCH BULLETIN
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2024
·
IF 5.3
Chuanyun Yang,Xingjian Zhang,Zhengdao Li,Zhishuai Wang,Jiping Shi,Haiquan Xie,Ting Li,Yong Zhou
A series of hybrid films were designed and fabricated by in situ growth of Ag 2 S nanoparticles with varying content on BiVO 4 nanosheets deposited on stainless steel mesh. The formation of a p-n heterojunction between Ag 2 S and BiVO 4 enabled an extended spectral response range and facilitated the separation of charge carriers through a single directional pathway for electron transport. Exploiting these advantages, Ag 2 S/BiVO 4 composites were employed in various photocatalytic applications under simulated solar irradiation. The results demonstrated, in terms of water purification, that the composite not only possessed photocatalytic ability to degrade RhB or Cr(VI) individually but also exhibited significantly enhanced photocatalytic efficiency in simultaneously removing mixed pollutants containing RhB and Cr(VI). In terms of CO 2 conversion, Ag 2 S/BiVO 4 also displayed a stronger photocatalysis capability compared to pure BiVO 4 film. Furthermore, the immobilized Ag 2 S/BiVO 4 film exhibited improved mechanical strength and long-term stability, making it highly suitable for practical applications.
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FUEL
·
2023
·
IF 7.4
Chenglong Yu,Junhui Dan,Zewei Liu,Jinliang Wang,Jiayang Wang,Hansun Fang,Fayin Lai,Danping Li,Lin Li,Fengying Li,Chunhuo Zhou,Bichun Huang
Carbon materials prepared using conventional strategies tend to have serious defects such as low porosity and a single pore structure, which compromise their VOC removal performance. Herein we report on a group of experimental porous carbons that were fabricated using water hyacinth (WH) as the starting material which is abundant in of N and P. The experimental results showed that the HWK-H prepared using a co-hydrothermal method exhibited the best performance in adsorbing methylbenzene with a saturated adsorption capacity of 624.7 mg/g. The results of several characterization tests revealed that HWK-H exhibited a high specific surface area (2199.9 m 2 /g), large pore volume (1.415 cm 3 /g), a specific micro/mesoporous structure, surface functional groups (mainly C = O, C-O and COOH), and a very disordered structure. All these properties were the reason for its superb methylbenzene adsorption performance. DFT calculations showed that the presence of N and P groups in the samples improved the energy of adsorption of the porous carbon materials for methylbenzene, thereby promoting its adsorption. GCMC simulation results also revealed that the carbon's micro/mesoporous pores in the range of 0.45–5.0 nm also facilitated the adsorption of methylbenzene. In addition, the multi-component co-adsorption performance and reusability of HWK-H were evaluated and the results showed that HWK-H offered good prospects for industrial application.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yu Huang,Guoping Zhu,Zhennan Wang,Yadong Wang,Zongmin Zhu
This study designed and synthesized a novel phosphorus silicon synergistic flame retardant PDD. Only adding 1 wt% PDD can achieve excellent UL-94 V-0 flame-retardant rating for PLA composite, and the limit oxygen index (LOI) can be increased to 26.8 %. At the same time, the thermal stability and crystallinity of composites are significantly improved. The results of the cone calorimeter test show that compared with pure PLA, PLA/1 % PDD reduces the peak heat release rate (pHRR), total heat release (THR), and peak of CO 2 release rate (pCO 2 P) by 38.2 %, 42.9 %, and 26.6 %, respectively. It is worth noting that PDD not only enhances the tensile strength and impact toughness of PLA composites, but also accelerates their chemical degradation process in alkaline environments through ester bond hydrolysis promoted by phosphorus silicon synergy. This work has achieved a multifunctional integration of mechanical properties, efficient flame retardancy, and chemical degradation, providing new ideas for the development of multi-functional biodegradable polymers.
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产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Jinghang Zhu,Jiahao Shen,Haitong Zhao,Honghong Luo,Yiqun Fang,Weihong Wang,Yongming Song,Qingwen Wang
s With growing global resource constraints and environmental concerns, sustainable and eco-friendly characteristics have made bio-based materials the focus of considerable attention. In this work, a novel bio-based composite intumescent flame retardant (SVDP), incorporating P, N, and S as flame-retardant elements, was prepared through Schiff base condensation, addition reaction, and electrostatic ionic interaction, employing phytic acid, vanillin, sulfonamide, and 9,10-dihydro-9-oxa-10-phospha-phenanthrene-10-oxide as precursors. SVDP was introduced into polypropylene-based wood-plastic composites (WFPP) to enhance flame retardancy and smoke suppression performance. Relative to the neat WFPP, the incorporation of 20 wt% SVDP increased the limiting oxygen index (LOI) to 27.2%, while the peak heat release rate (PHRR) decreased by 23.3% and the total heat release (THR) declined by 25.8%. Even at low loadings, SVDP demonstrated notable smoke suppression effects. The flame-retardant mechanism of the SVDP/WFPP system was comprehensively investigated using TG-FTIR, Raman spectroscopy, SEM, and other characterization techniques. By employing a multifunctional bio-based composite flame retardant, this work provides an eco-friendly and efficient strategy to strengthen the fire-retardant performance of wood-plastic composites.
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2025
·
IF 10.5
Yujie Liu,Xinyu Zhang,Haomin Chen,Ziling Yuan,Xiujuan Tian,Nan Xu,Ruihua Liu,Chao Yang
The previously constructed biosensors for organophosphate pesticides (OPs) detection cannot be used to measure OPs concentrations under high salt conditions. In this study, a novel halotolerant whole-cell biosensor J9U-pBBR- pobRA - gfp , which consisted of a p -nitrophenol (pNP)-responsive transcription regulator PobR and its cognate promoter fused to a reporter GFP, was constructed from a salt-tolerant chassis Halomonas cupida J9 for pNP-substituted OPs detection in high-salinity environments. Through dynamic regulation of PobR expression levels, the leaky fluorescence was significantly reduced. Furthermore, the optimized biosensing circuits were introduced into an OP-degrading chassis J9U- mpd , to generate dual-functional biosensors that could degrade 40 μM methyl parathion (MP) within 80 min in high-salinity media. The biosensors exhibited broad specificity towards pNP-substituted OPs (e.g., MP and fenitrothion), while showing no response to non-pNP-substituted OPs like chlorpyrifos. Dose-response curves indicated that the three biosensors J9U- mpd -pBBR-P3 (P15 or P17) pobRA - gfp maintained a linear detection range of 0.1–60 μM for pNP and 0.1–20 μM for MP in high-saline media. Biosensors J9U- mpd -pBBR-P3 (or P17) pobRA - gfp achieved a low detection limit (LOD) of 0.1 μM for both pNP and MP in seawater and high-salinity river water, and showed a LOD of 0.019 mg/kg for pNP and 0.026 mg/kg for MP in saline-alkali soil. pNP and MP concentrations estimated by the biosensors J9U- mpd -pBBR-P3 (or P17) pobRA - gfp matched well with pollutant concentrations measured by HPLC analysis, demonstrating the reliability of the biosensor detection results. The halotolerant biosensor can be applied to efficient degradation and precise quantification of OPs in hypersaline aquatic and terrestrial ecosystems. Our strategy of combining synthetic biology with extremophile chassis may be utilized to create novel biosensors for pollutant detection in extreme environments.
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产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
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2013
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IF 1.848
Jingcheng Liu,Ren Liu,Yan Yuan,Shengwen Zhang,Xiaoya Liu
Novel superhydrophobic antistatic coatings were prepared from the branched alternating copolymers P(St- alt -MAn) and carbon nanotubes through a facile method. Pristine multiwalled carbon nanotubes (MWCNTs) were non-covalently modified by an organic–inorganic hybrid of the branched copolymers P(St- alt -MAn) and silica with the existence of γ-aminopropyl-triethoxysilane. The modified MWCNTs were mixed with tetraethyl orthosilicate in ethanol, coated with a fluoroalkylsilane, and then heat treated to obtain the superhydrophobic antistatic coatings. Scanning electron microscopy (SEM) showed that the coatings have a micrometer- and nanometer-scale hierarchical structure similar to that of lotus leaves with high water contact angles (>170°). In addition, the relationship between content of MWCNTs and the properties of the coatings, as well as the effect of cure temperature on contact angle values were investigated systematically.
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高影响因子
NANOTECHNOLOGY
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2016
·Vol. 27
·期 14
·145701
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IF 3.573
Yong Zuo,Ji-Ming Song,He-Lin Niu,Chang-Jie Mao,Sheng-Yi Zhang,Yu-Hua Shen
P-nitrophenol (4-NP) and hydrazine hydrate are considered to be highly toxic pollutants in wastewater, and it is of great importance to remove them. Herein, TiO2-loaded Co0.85Se thin films with heterostructure were successfully synthesized by a hydrothermal route. The as-synthesized samples were characterized by x-ray diffraction, x-ray photoelectron spectroscopy, transmission electron microscopy and selective-area electron diffraction. The results demonstrate that TiO2 nanoparticles with a size of about 10 nm are easily loaded on the surface of graphene-like Co0.85Se nanofilms, and the NH3 · H2O plays an important role in the generation and crystallization of TiO2 nanoparticles. Brunauer–Emmett–Teller measurement shows that the obtained nanocomposites have a larger specific surface area (199.3 m2 g−1) than that of Co0.85Se nanofilms (55.17 m2 g−1) and TiO2 nanoparticles (19.49 m2 g−1). The catalytic tests indicate Co0.85Se–TiO2 nanofilms have the highest activity for 4-NP reduction and hydrazine hydrate decomposition within 10 min and 8 min, respectively, compared with the corresponding precursor Co0.85Se nanofilms and TiO2 nanoparticles. The enhanced catalytic performance can be attributed to the larger specific surface area and higher rate of interfacial charge transfer in the heterojunction than that of the single components. In addition, recycling tests show that the as-synthesized sample presents stable conversion efficiency for 4-NP reduction.
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ANALYTICA CHIMICA ACTA
·
2022
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IF 6.911
Yanan Deng,Zihao Zhang,Yuanhao Pang,Xueying Zhou,Yu Wang,Yun Zhang,Yali Yuan
The poly-L-cysteine modified Au nanoparticles (Au@p-L-Cys) were constructed on electrode surface as a highly efficient chiral interface for tryptophan (Trp) enantiomers recognition via one step electropolymerization. With the aid of Cu 2+ , L-Cys residues and D-Trp target formed a sandwich complex D-Trp-Cu 2+ -L-Cys, while L-Trp was unable to form such complex due to the steric hindrance provided by the chiral interface, which was confirmed by the electrochemical and SEM results. With the introduction of ferricyanide probe, D-Trp produced significant current decrease while L-Trp produced a slight current increase, which implied the successful enantioselective recognition of Trp enantiomers (specifically D-Trp) in the true sense. This novel sensor showed a surprisingly wide linear range toward D-Trp of 6 × 10 −7 M to 1 × 10 −2 M, with a detection limit as low as 75 nM (S/N = 3). Moreover, the exclusive enantioselectivity toward D-Trp was discovered since other amino acids showed negligible interference to detection of D-Trp. The recovery of D-Trp in human serum was between 91.30 and 109.3%, which further verified the satisfying specificity and practicality of the proposed strategy. The coordination thermodynamics by UV–Vis spectroscopy and DFT simulation were also used to investigate the enantioselective mechanism. These results highlight the great potential of using Au@p-L-Cys to construct chiral interface for enantiomers recognition and hold the promise of practical application of electrochemical chiral sensors in fields like pharmaceutics and bioanalysis .
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高影响因子
ACS Applied Energy Materials
·
2020
·
IF 4.473
Siqi Zhu,Hong Yin,Yatong Wang,Kwan San Hui,Xi-Lin Wu,Wenjie Mai,Xiaoting Hong,Fuming Chen,Kwun Nam Hui
Amorphous-ordered mesoporous carbon materials are regarded as the most promising anode candidate for sodium-ion batteries (SIBs) owing to their eco-friendliness, abundance, thermal stability, and low price. However, poor rate, low initial Coulombic efficiency, and poor cycling performance have been the major challenges of SIBs. Herein, we successfully constructed a robust phosphorus and nitrogen-codoped Zn node porous polyhedral carbon polyhedron (P–N–Zn–C). The as-prepared P–N–Zn–C anode delivers outstanding electrochemical performance and ultrahigh stability and has achieved a remarkable capacity of 460 mA h g–1 at 100 mA g–1, long-term cycling stability of up to 100 cycles, and an excellent rate performance even at a current density of up to 1000 mA g–1. The remarkable performance can be ascribed to the enlarged interlayer distances of carbon and the existence of Zn node, which facilitate the insertion–extraction of Na ions. The first-principles density functional theory calculations revealed that the presence of P, N, and Zn could reduce the band gaps between the valence and conduction bands and accelerate the electron transfer reaction rate. This study underscores the potential importance of heteroatom doping as an effective strategy for improving the performance of carbon electrode materials.
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JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Jaehyeong Park,Sungjun Bae
In this study, a magnetically recyclable Pd catalyst was developed by using the novel support of iron-rich coal fly ash/silica (IRFA@SiO 2 ) for highly efficient reduction of p -nitrophenol ( p -NP). IRFA microspheres were coated with amorphous SiO 2 synthesized from non-magnetic coal fly ash (NMFA) and then loaded with Pd by impregnation method for the synthesis of Pd/IRFA@SiO 2 . Various surface analyses demonstrated that amorphous SiO 2 was well deposited on the surface of IRFA, providing a unique three-dimensionally structured SiO 2 layer to suppress aggregation of IRFA and enhance dispersion of Pd nanoparticles. Pd/IRFA@SiO 2 exhibited a significantly enhanced p -NP reduction than those of Pd/IRFA, Pd/Al 2 O 3 , and Pd/SiO 2 . Compared to other Pd- and metal-loaded catalysts, Pd/IRFA@SiO 2 showed ˜4000× enhancements in k obs-p-NP /C M (L min −1 g M −1 , M = precious metals) values and ˜3800× increases in price-normalized k obs-p-NP values, indicating that Pd/IRFA@SiO 2 is a highly efficient and cost-effective alternative catalyst. The catalyst was successfully recycled five times without significant leaching of Pd, Si, and heavy metals because of the magnetic property of Pd/IRFA@SiO 2 . The experimental results suggest the applicability of the surface-modified IRFA support for the development of novel magnetically recoverable catalysts without severe toxicity problems.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2015
·
IF 2.587
Zhiqiao He,Lixian Jiang,Da Wang,Jianping Qiu,Jianmeng Chen,Shuang Song
A series of fluorinated anatase TiO2 nanosheets with dominant {001} facets were synthesized to oxidize p-chlorophenol (PCP) and reduce Cr(VI) simultaneously under visible light. The {001}/{101} surface facets ratio of TiO2 was controlled by varying the initial HF concentration, and fluorine-free samples were obtained by alkaline-washing. A synergistic effect among TiO2, Cr(VI), and PCP was observed, which is ascribed to effective trapping of photogenerated electrons and holes by Cr(VI) and PCP, respectively. A maximum synergistic effect was obtained at a molar ratio of [PCP] to [Cr(VI)] of one. Using X-ray diffraction, X-ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy, field-emission scanning electron microscopy, transmission electron microscopy, and Brunauer–Emmett–Teller analyses, the optimum ratio of exposed {001} to {101} facets for TiO2 was determined to be 80:20 because of selective transfer and charge balance of photogenerated carriers. Surface fluorination facilitates the formation of oxygen vacancies and unsaturated Ti atoms, which is useful for visible light activity induction, extending the lifetime of photogenerated electron-hole pairs, and enhancing the rate of PCP oxidation and Cr(VI) reduction.
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高影响因子
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